Filtering device



Jan. 2z, 1924. 1,481,491

A. E. BAss FILTERING DEVICE Filed Feb. 5 1922' Patented dans 22, i240 ARCHIE E. BASS, 0F BIRMINGHAM, ALABAMA,

surname- DEVICE.

Application led February 3, 1922 Serial No. 533,967.

To all 'whom t may concern.'

Be itknownV that I, AnoHiE E. Bass, residing at Birmingham, Alabama, have invented certain new and useful Improvements in Filtering Devices; and I do hereby declare the following to be'a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertainSL-to make and use the same.

This invention relates tocertainimprovements in oil burners, and particularly to a device of this character involving the use of a filter or strainer for the oil directed under pressure through the burner, but is not limited to this specific use.`

The principal object of the invention is to provide a filtering means for use vin this connection, involving the cooperation' of two strainers so associated with that portion of the burner disposed outside of the furnace with which it is used, as to permit the withdrawal of one of the strainers for' cleaning purposes without interfering with the operation of the burner or disarranging any of the working parts thereof.

Another object of the invention resides in the particular arrangement whereby` the necessary communication is established from the source of supply through both of the strainers to the burner nozzle, during the substituting of one strainer for the other, so

' that the cold oil-previously trapped in the strainer not. in use will not suddenly be directed to the` burner nozzle when. this strainer is. finally brought into o eration, which will/be hereinafterA more iliilly describedE i The invention also contemplates a means ed to be projected into the furnace` having` its inner end provided with a )et nozzle, or the like, and its outer end connected to the source of supply for the oil which is directed to the burner under the desired pressure. This outside portion of the burner' tube is somewhat enlarged, andl has rotatably mounted thereon a holow casing provided with diametrically oppositcly positioned strainers, the outer end portions of each strainer being inthe form of a screw plug and providing a means for securing and maintaining these strainers within the rotary casing. Adjacent the 4inner end of each strainer is a ort adapted to register with certain radial y disposed ports formed in the burner tube, said ports in the burner tube being positioned so that when the casing is vertically disposed, communication lis established from the source of supply into the outer end of the burner tube, and thence through the port in the burner tube downwardly into one of the strainers registering with said port, through said strainer and back into the tube through other registering ports carried by the rotary casing and burner tube, the oil finall being discharged through the nozzle of tie burner. When i'n this position ofthe rotary 'casing or casting, the lower strainer is the only one being used, the inlet and outlet ports of the casing associated with the being cut ofi' so that said upper straine can be readily removed for cleaning withoui disturbing 4in anyway the functioning of the burner. When it is desired to clean the lower strainer, the strainer casing-.his rotated to bring the upper strainer into play, whereby vthe strainer previously used caribe cleaned inthe manner as hereinbefore de scribed." It will 'be noted that when the lower strainer is moved to the upper position, there is a'certain amount of oil trapped in that ortion'of the strainer casing, which eventually cools, so that after this strainer has been cleaned, and subsequently brought into operation, this cold 'oi would be directed to the burner nozzle, which often'- times would result in the putting out of thev flame at the discharge end of the nozzle. 'To prevent this, the burner tube is. provided with oppositely disposed, horizontally arranged ports, which will register. with both strainers when the 'strainer casing is in lits horizontal position, and, when in this position, the oil will be directed from the source of `supply' to the nozzle through both of the strainers, .whereby the vheated oil under pressure will be mixed Awith the cold oil previously referred to, and the resulting mixture will be of suliicient 1y high temperaupper strainer V ture to prevent any material change in the flame atthe burner nozzle., It is therefore customary, when reversing the strainers, to momentarily leave the casing in its horizonspectively,

tal position, for the reasons previously stated, before completing the reversing operation.

lt has also been found necessary at` times to reduce the size of the orifice or discharge op'ening of the nozzle, and heretofore this has been accomplished by entirel removing theburner from the furnace, w ich necessitates of course the shutting olf of the supply of oil to that burne In furthering the object of the present invention, applicant has provided a burner nozzle with ,a rotary disc, or the like, provided with graduated apertures or perforations adapted to successively register with the main discharge opening of the nozzle, a rotation of this disc bringing one of the desired apertures into operation. To rotate the disc, the same is connected by suitable gearing to a rod eX- tending through the burner tube to the outi side ofthe furnace, whereby the desired adjustment of the nozzle can be effected without removing the burner from the furnace.

The preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a vertical sectional view of the assembled burner;

Fig. 2 is a view partly in section and part` ly in elevation on line 2-2 of Fig. 1, the horizontal position of the strainer casing being shown in dotted lines; and

Fig. 3 is an end elevation thereof.

Referring to the drawings in detail, 1 represents the burner tube proper, having secured to its inner'end a nozzle 2, and being provided with an enlarged outer end portion 3, said outer end portion communicating with a source of supply 4; for furnishing the desired heated oil under pressure to the burner.

Rotatably mounted on this enlarged outer end 3 of the burner tube 1. is a casing, 5,said

casing being positioned between annular shoulder members 6 and 7 carried by the outer end 3 of the burner tube. Intcrposed' between the casing and the annular shoulders and 7 are suitable packing washers,

8 and 9, preferably of lead and steel. Radially positioned within the casing 5 are two diametrically opposite strainers or filters 10 and 11 having their outer ends terminating in'enlar ed screw plugs, 12 and 13 rew ereby the strainers are removably secured within the casing 5. The inner ends of the strainers 10 and 11 are held in recessesor seats 14 and 15 respectively formed in an enlarged centrally dispose annular portion 16 carried by the casing 5 and immediately surrounding the burner tube. This enlarged central portion 16 of the casing is provided with ports 17 and 18 communicating with the interiors of the strainers 10 and 11 respectively. Adapted to register with these' ports 17 and 18, at

-the burner tube is the proper time, are radially disposed ports 19 and 20 formed in the burner tube. The port 19 is located on the lower side of the burner tube, and the ports'20 are formed in lthe diametrically opposite sides of said tube, as clearly shown in Figs. 1 and 2.

ln addition to the ports. 17 and 18, communicating with the inner ends of the strainers, the casing 5 is also provided with outlet ports 21 and 22 in communica-tion with the sides of the respective strainers l0 and 11. These ports to communicate with ports 23 and 2 4 formed in the burner tube, in a manner similar to the communicating of the ports 17 and 18 with ports 19 and 20.

In Fig. l, the various parts are shown with the lower strainer in operation, and the upper strainer cutoff. ln this position it will be noted that the heated oil under pressure from the source of supply is conducted to the outer end of the burner tube from the pipe i through the registered ports 18 and 19, through the strainerll, and back into the burner tube 1 by way of the registering ports 22 and 23, and thence to the burner nozzle 2. In this x)position of the strainers 10 and 11, the ports 17 and 21 communicating therewith are entirely cut ofi from the oil supply, can be readily removed and cleaned. During this operation, the oil, which is necessarily trapped in the upper compartment surrounding the strainer 10, becomes cool, so that if the strainers were immediately reversed, this cold oil would precede the charge of warm oil under pressure to the burner, resultin in obvious disadvantages hereinbefore 'l referred to. To prevent this,

provided with diametrically opposite, horizontally disposed ports 2O and 24, so that as the casing 5 is rotated to reverse the strainers, the same is momentaril arrested in its horizontal position, whic ermits the oil under pressure to be directe through both strainers, and thereby causes a mixing ofthe warm oil and cold oil, obviating the diiiiculty which would otherwise be experienced for the reasons stated.' p

In order to maintain the casing 5 in its vertical or normally operative position, a locking device 25, comprising a wing bolt or the like, is provided, as clearly shown in the drawing.

The burner nozzle 2 is constructed with vthe usual discharge orifices 26, terminating and said upper strainer' 21 and 22 are adapted IIN) llU

to perform this adjustment. 1n the present construction, there is provided a rotary disc I with. an lindicator Meine? 28 constructed with a series of graduated openings 29, said openings adapted to register with thedischarge orifice 27 of the nozzle. This regulating disc 28 is connected with 'a stub shaft 30 carrying 'a gear 'Wheel 31, said gear 3l being in mesh with a corresponding gear 32, lreyed to the inner end of an adjusting rod 33, said rod being disposed Within the burner tube and extending out from the rear end thereof. The extreme outer end of this adjusting rod 33 is provided Witha squared end, or the like, 34, to lit a specially 'designed wrench 'for turning this rod. This cutyvardlf projecting end portion of the rod f33is also Yprovided hand, or, the like, 35, cooperating with an appropriate dial 36, the indications thereon corresponding to the openings in the regulating disc 28, so that the desired regulation of the orifice .27 can be'determined by a reading of the dial.

From the foregoing description, it vvill be noted that the straining device 'for the oil direct to the burner will be capable obeing cleaned, and the burner nozzle can also be regulated, Without disturbing the operation of the burner or removing the same from the furnacen the particular strainer construction hereinbefore described, is not necessarily' limitedv to oil burners, but is equally' well adapted for use in comlectionl with any duid directed through an analogous device. ,lt is to be also understood that said strainer arrangement can be laced in an art'of the su ply A y i3 P the casing as shown and gips line lan does not have to be associated irectly vvith Athe burner' tube. Furthermore, applicantis not to be limited to the specilic means of securing tbe strainersin described, as there may be times, owing to the size of the de-l vice, when this particular' securing means would be impractical. The present construction is lonly one of many rnodiications of this partof the device and the same is to be limited only so 'Ear as defined by the claims. i

'What l claim is: 4 i

l. ln a straining device for fluids, the combination with a conduit therefor, of a casing rotatablymounted on said conduit, independent straining Aor filtering means positioned Within said casing, inlet and outlet ports to and from said filtering' means carried by said casing, corresponding ports formed in that part of the conduit surrounded b said casing, said ports being located so t at the necessary' communica-tion from said conduit through both Filtering means, and backeinto the conduit, will be established only when said casing is in its horizontal position, and communication established through one of said ilters only when the casing is in its vertical position.

lresponding ports formed 2. ln straining device, the combination of a conduit therefor, of a casing rotatably mounted on said conduit, radially disposed independent removable strainers positioned Within said casin to and from said iter-ing means carried by said casing, corresponding ports formed in that part of the conduit surrounded by said casing;l said; ports being located so that the necessary communication from said conduit oi', inlet and outlet ports to. and from said filtering means carried by said casing, corin that part of the conduit surrounded by said casing, said ports being located so that the necessary communication from said conduit through one oilsaid iilters only, and back into the f, conduit, will be established when the cas'- lt is, of course., to be understood thating 1s in its vertical position.

4., In a straining device tor fluids, the combination with a conduitthere'for, ot a substantially cylindrical casing rotatably mounted at its intermediate portion om said conduit, radiallydisposed independent cylindrical strainers positioned Within said casing-eachside of said conduit, means Afor removably securing said strainers "Within said casing, moved from 'the ends thereof, inlet and outlet-ports to and from said tiltering means carried by said casing, corresponding ports formed in that part,l of the conduit surrounded by said casing, said ports being located so "that the necessary communication from said conduit through one of said lilters only, and back into the conduit, will be established when the casing` is in its vertical position.

5. :in a straining device for liquid 'fuel burners and the like, the combination with a burner tube and nozzle therefor, of a casing rotatably mounted on tbe 'fuel receiving end of said burner tube, independent strainers positioned Within said casing, inlet and v outlet ports to and from said tiltering means carried lby said casing, corresponding' ports formed in that part .ci the conduit surrounded by said casing, said ports being located so that the necessary communication from said conduit through one of said filters only, and'baclr into the conduit, will be established when the casing is in its vertical position.

6. In a straining device for liquid fuel burners and 'the like, 'the combination with inlet and outlet ports whereby the saine may be reestablished when i tea dependent cylindrical a burner tube and nozzle therefor, o a substantially cylindrical casing rotatably' mounted at its intermediate portion on the fuel receiving end of said burner tube, in-

strainers positioned within said casing each sideof said burner tube, means for removably securing said strainers Within said casing whereby they may be removed from the ends thereof, in let and outlet ports to and from said iltering means carried by said casing, corre* spending ports formed in that part of the conduit surrounded by said casing, said ports being located so that the necessary communication from said conduit throughV one ot said filters only, and back into the conduit, will be established when the casing is in its vertical position.

7 ln a straining device for liquid fuel burners and the like, the combinationwith a burner tube and nozzle therefor, of a substantially cylindrical casing rotatably mounted at its intermediate portion on the fuel receiving end of said burner tube, independent cylindrical strainersi positioned within said casing each side' oitA said burner tube, screw-threaded enlargements formed on the outer ends of each strainer, whereby said strainers are removably threaded into the outer ends of said outlet ports to and from carried by said casing, corresponding ports formed in that part of the conduit surrounded by said casing, said ports being located so that the necessary communication ,from said' conduit through both ltercasing, inlet and said filtering means meneer ing means, and back into the conduit, will be established only when said casing is in its horizontal position, and said communication established through one of said filters only when the casingis in its vertical position.

8. In a strainin device for liquid fuel burners and the li e, the combination With a burner tube and nozzle therefor, of a substantially cylindrical casing rotatably mounted at its intermediate portion on the fuel receiving end of said burner tube, in-

dependent cylindrical strainers positioned Within said casing each side of said burner tube, screwethreaded enlargements formed on the outer ends of each strainer, whereby said strainers are removably threaded into the outer ends of said casing, inlet and outlet ports to and from said filtering means carried by said casing, corresponding ports ormed in that part of the conduit surrounded by said casing, said ports being located so that the necessary communica tion from Said conduit through both filtering means,1and back into the conduit, will be established only when said casing is in its horizontal position, end said communication' established through one of said filters only when the casing is in its vertical position means for maintaining a tight joint between the rotary and means for securing said casing in its operative positions.

ln testimony whereof atiix my signature.

ARCHE E. BASS.

casing and burner tube, 

